Password policy paging with proper sorting
    
    This patch adds option to disable sorting when paging. It allowed to enable paging in password policy with order of items untouched (they are sorted on server side by priority).
    
    Also fixing issue when paging is disabled and command summary = null. It displayed 'null' in facet footer.
    
    https://fedorahosted.org/freeipa/ticket/2677